MACH
®
Gas Fired Boiler
19
•
Cement and primer must conform to
ASTM F493
•
Three feet of venting closest to the boiler
must not be enclosed
•
The vent shall not be insulated
Table of CPVC Support Spacing (Feet)
Table of Stainless Steel Adapter for CPVC Part Numbers
Vent Size
Sch 40
Sch 80
4
4
4-1/2
6
4-1/2
5
8
5
5-1/2
10
5-1/2
6
12
6
6-1/2
A customer supplied adapter is required to be installed between the boiler and the CPVC venting. Below is a table
containing the available adapter for each size MACH
®
boiler. Installer should use Adapters listed below or equivalent.
3.5.3.5
Required Clearances
Provide clearances between combustion air intake, exhaust vent, roof and wall surfaces, doors and window, and
snow line. Refer to Figure below: Termination Clearances – Forced Draft and Direct Vent Installations.
Reference: NFPA 54/ANSI Z223.1 National Fuel Gas Code
Boiler Size
Nominal
Stack Size
Stainless Adapter for CPVC
Part Number
C750
6"
2620000237
C900
8"
2620000238
C1050
8"
2620000238
Do not locate intake or exhaust terminations directly above a walkway;
dripping of condensation can cause icing of the walking surface. Maintain a minimum clearance of 4 ft
(1.22 m) horizontally from any electric or gas meter, regulator or relief equipment.
